Natural processes, not global warming, are primarily to blame for the dissolution of the fragile, ice-like solid fuel substances known as methane hydrates, according to new research published online Thursday in the journal Science.

Scientists have known that climate change affects the population dynamics of single species, such as reindeer or caribou, but the effects of such climate change at the community level have been much harder to document and quantify.

Though Mars is 140 million miles away, it shares some similarities with Earth. Some of its landforms, for existence, closely resemble regions found here on Earth.

Word of the Day

pawl

A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.